Tsio-541

[Ollieboy]

I am new here and I’m not sure I’m post in the correct place, but here it goes.
I have a tiso- 541 engine and was wondering if anyone has any experience with this engine as
far as putting it on an airboat.
I am wanting to do away with the heavy turbocharger and fuel injection and put a 750/850/950
carburetor on it. Does anyone know the implications of doing this?

 

[kwanjangnihm]

This engine comes with low compression pistons with a ratio of 7:3-1, so if you remove the turbo, your horsepower would drop down to a stock horsepower of ~240-260. Some of the engine builders can confirm this.

 

[Ollieboy]

Wow, I thought the turbo was to increase/maintain hp at altitude, I had no clue
that it was that influential at sea level.

 

[Seadrift]

leave it the way it come off the airplane , turbo & injected. I have been running one for 15 yrs. no issues, they are powerful & economical to run as long don't hold your foot on the floor. My turbo will give 42 lbs of boost & that taint nothing but HPower. FYI they due lag a little bit, they were set up for constant speed propellers, any questions give buzz I will help all I can

 

[Slidin Gator]

leave it the way it come off the airplane , turbo & injected. I have been running one for 15 yrs. no issues, they are powerful & economical to run as long don't hold your foot on the floor. My turbo will give 42 lbs of boost & that taint nothing but HPower. FYI they due lag a little bit, they were set up for constant speed propellers, any questions give buzz I will help all I can

Do this vs. just delete stuff. Otherwise it can be rebuilt with higher compression pistons etc. in any form you want. They were all designed to "Not fall out of the sky". I like normally aspirated but injected.

Wow, I thought the turbo was to increase/maintain hp at altitude, I had no clue
that it was that influential at sea level.

The experimental aviation crowd describes 10:1 pistons as cheap turbos. It's all about putting enough air in the engine and compressing it properly, change the waste gate settings on what you got and away we go Charlie!

If you are a boost kinda guy keep the pistons you got. If you want to delete the boost, go 8.5 minimum and John Fenner will definitely tell you 10:1

What's the plan here?

 

[John Fenner]

Commented on the other post.

Well, first off, ditching the hair dryer, and the injection, you should pull the cylinders off, install a set of 10:1 forged pistons to get the performance out of the 100LL.
As far as carburetor selection goes, a 500 holley will be all you need, power valve block off plug, #78 jets, #31 accelerator squirter, ditch the scintered bronze filter of the fuel inlet.
If you have the capability, advance the camshaft timing to 114° centerline, this will be the optimal setup.

 

[Ollieboy]

Thanks for the replies!!!
I didn’t mention that the turbo and the fuel injection system is not on the motor
at this time, I do have all that, but have no idea about setting it up. There is a smaller turbo
that the previous owner was going to use instead of the huge, heavy one that was originally
on the engine, but again, I don’t know enough about it to feel comfortable with the setup.
As far as going to a carburetor, the manifolds intake port is on the end of the manifold, does
fabricating a carburetor stand on the end pose a flow problem or should that port be
plugged and a stand welded in the center of the manifold?

 

[OneBFC]

leave it the way it come off the airplane , turbo & injected. I have been running one for 15 yrs. no issues, they are powerful & economical to run as long don't hold your foot on the floor. My turbo will give 42 lbs of boost & that taint nothing but HPower. FYI they due lag a little bit, they were set up for constant speed propellers, any questions give buzz I will help all I can

42 psi of boost? I would like to see a picture of that....

 

[Blownaway540]

The turbo weighs 40 lbs and will help you push 20 times more than it weighs. Besides that, they are cool.